1.4542 H1150 Stainless Steel Round Bar

If you are looking for a stainless steel round bar that combines high strength, excellent corrosion resistance, good toughness, and stable mechanical properties, the 1.4542 H1150 stainless steel round bar is an ideal choice; it is one of the most widely used precipitation-hardening (PH) stainless steels. The H1150 condition refers to an aging heat treatment performed at approximately 1150°F (621°C); compared to lower-temperature aging treatments such as H900, this process significantly enhances the material's toughness and ductility.

 

GNEE supplies 17-4PH / 630 / 1.4542, one of the most popular and widely used copper-containing precipitation-hardening martensitic stainless steel chromium-nickel alloy steels. It offers high corrosion resistance while maintaining high strength properties, and can be used in a temperature range of -29℃ to 343℃ while maintaining relatively good performance. Furthermore, this grade of material has good ductility, and its corrosion resistance is comparable to that of 1.4301 / X5CrNi18-10.

 

17-4 Stainless Steel Round Bar Specification

Specifications : ASTM A564 /ASME SA564

Grade: AISI 630 SUS630 17-4PH 1.4542 PH

Length :5.8M,6M & Required Length

Round Bar Diameter : 4.00 mm to 400 mm

Bright Bar : 4mm – 100mm,

Tolerance : H8, H9, H10, H11, H12, H13, K9, K10, K11, K12 or as per clients' requirements

Condition : Cold Drawn & Polished Cold Drawn, Peeled & Forged

Surface Finish : Black, Bright, Polished, Rough Turned, NO.4 Finish, Matt Finish

Form : Round, Square, Hex (A/F), Rectangle, Billet, Ingot, Forged Etc.

End : Plain End, Beveled End

 

17-4 Stainless Steel Round Bar Chemical Composition

Ni	Cr	Mo	Mn	Cu	Si	C	Cb+Ta	S	P	Fe
MIN	3.0	15.0	–	–	3.0	–	–	5 x C	–	–	–
MAX	5.0	17.5	0.50	1.0	5.0	1.0	0.07	0.45	0.03	0.04	Balance

 

17-4 Stainless Steel Round Bar Physical Properties

Temperature, °F	70	212	392	572
Coefficient of Thermal Expansion, in/in°F x 10-6	–	7.2	7.5	7.8
Thermal Conductivity Btu • ft/ft2 • hr • °F	8.6	9.2	9.8	10.4
Modulus of Elasticity, psi X 106	29.0	28.1	27.0	26.1

 

17-4 Stainless Steel Round Bar Mechanical Properties

	H 900*	H 925	H 1025	H 1075	H 1100	H 1150	H 1150-M
Ultimate Tensile Strength, ksi	200	190	170	165	150	145	125
0.2% Yield Strength, ksi	185	175	165	150	135	125	85
Elongation % in 2" or 4XD	14	14	15	16	17	19	22
Reduction of Area, %	50	54	56	58	58	60	68
Hardness, Brinell (Rockwell)	420 (C 44)	409 (C42)	352 (C 38)	341 (C 36)	332 (C 35)	311 (C 33)	277 (C 27)
Impact Charpy V-Notch, ft – lbs	15	25	35	40	45	50	100

 

Smelting Option:
1 EAF: Electric Arc Furnace
2 EAF+LF+VD: Refined-smelting and vacuum degassing
3 EAF+ESR: Electro Slag Remelting
4 EAF+PESR: protective atmosphere Electro Slag Remelting
5 VIM+PESR: Vacuum induction melting

 

Heat-treatment Option:
1 +A: Annealed (full/soft/spheroidizing)
2 +N: Normalized
3 +NT: Normalized and tempered
4 +QT: Quenched and tempered (water/oil)
5 +AT: Solution annealed
6 +P: Precipitation hardened

 

17-4 PH Stainless Steel Round Bar Prices (Latest as of 2026)

As of January 2026, the price of standard 17-4 PH (UNS S17400, SUS 630, EN 1.4542) stainless steel round bars is US$4.8-7.2 per kilogram (FOB Shanghai), conforming to ASTM A484/A276 standards. Specifically, 17-4 PH SS hot-rolled round bars (10-130 mm diameter, black/pickled surface) are priced at US$4.8-5.8 per kilogram, while 17-4 PH SS cold-drawn bright bars (3-60 mm diameter, polished surface, H9-H10 tolerance) are priced at US$5.5-7.2 per kilogram due to higher precision requirements. The pricing of this product primarily depends on its precipitation hardening composition (15.0-17.5% chromium, 3.0-5.0% nickel, 3.0-5.0% copper, 0.15-0.45% niobium).

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17-4 Stainless Steel Round Bar Supplier

GNEE is a trusted supplier of precipitation-hardening stainless steel and specialty alloys in China. We supply 17-4 PH, 15-5 PH, and 17-7 PH alloys in various forms including bars, plates, profiles, and forgings. All products are sourced from certified steel mills and undergo rigorous chemical composition and mechanical property testing to ensure reliable quality.
Whether you are in the aerospace, oil and gas, marine engineering, or defense industry, we ensure that every batch of our products meets international standards and your specific application requirements.
Click here to view our complete range of precipitation-hardening alloys: PH Alloys.

FAQ

Q: What is the H1150 condition?
A: Precipitation hardening at about 1150°F (621°C) after solution treatment, giving 145 ksi (1000 MPa) tensile, 125 ksi (862 MPa) yield and 311 HB hardness.

 

Q: Is 1.4542 the same as 17-4PH?
A: Yes - 1.4542 is the EN material number of 17-4PH (AISI 630, SUS630, UNS S17400).

 

Q: What is the service temperature range of 17-4PH?
A: The recommended continuous service temperature range for 17-4PH stainless steel is -100°F to 600°F (-73°C to 316°C). Although the material can withstand temperatures up to 800°F (427°C) for short periods or under low-load conditions, its performance is subject to significant operational limitations when used outside this standard range.

 

Q: Is H1150 stronger than 316 stainless steel?
Yes. 1.4542 H1150 typically provides tensile strength above 930 MPa, significantly higher than standard 316 stainless steel.

 

Q: Can 1.4542 H1150 stainless steel be welded?
Yes, 1.4542 (also known as 17-4PH or AISI 630) stainless steel can be welded. However, welding it in the H1150 aged condition is not ideal because the heat from welding will disrupt the hardened micro-structure, lowering strength in the weld zone and requiring a full post-weld heat treatment to restore mechanical properties.

 

Q: Which is better, 17-4PH H900 or H1150?
H900: Maximum strength and hardness.
H1150: Better toughness, ductility, and stress corrosion resistance.
For safety-critical components exposed to impact or dynamic loads, H1150 is often preferred.